Screening: Potential subjects who call the Westwood Institute for Anxiety Disorders, Inc. requesting treatment will be given details about the study by a trained research assistant. Any questions that potential subjects have will be addressed. If subjects are interested, they will be invited to be screened to determine whether they meet initial criteria for the study. Potential subjects will be told that all information gathered during screening is confidential. If a potential subject does not meet inclusion criteria, or decides not to participate, the screening information will be destroyed. This information is then passed to the study physician, Dr. Kagan, who will contact potential subjects to make an appointment for further evaluation. Potential subjects are encouraged to discuss their possible participation in this study with their physician, therapist, and/or family members. They are also encouraged to write down questions they would like to ask the study physician upon further evaluation. This screening process is done as part of the research process.